Patents Assigned to NEC LCD Technologies
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Patent number: 7515131Abstract: It is a liquid crystal display device which can display simultaneously information which is different in the front and rear sides. It has a single liquid crystal panel, a lighting unit which is arranged at both-sides and comprised with the light source, and a control circuit which carries out drive controlling of these. This control circuit controls lighting on and off the light source of the lighting unit and controls a screen display of the liquid crystal panel, and realize the display which is different to both sides of the liquid crystal panel. Thereby, when the screen of the liquid crystal panel is simultaneously seen from both sides, an independent different image can be recognized visually.Type: GrantFiled: November 18, 2005Date of Patent: April 7, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Hiroshi Takeda
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Patent number: 7514303Abstract: A liquid crystal display device includes (a) a first substrate, (b) a second substrate spaced away from and facing the first substrate, (c) a liquid crystal layer sandwiched between the first and second substrates, (d) a transistor formed on the first substrate, (e) a wiring layer formed on the first substrate and electrically connected to the transistor, (f) a reflection electrode formed on the first substrate, an external incident light being reflected at the reflection electrode towards a viewer, and (g) a compensation layer formed directly on the wiring layer. The reflection electrode does not cover the wiring layer therewith, and the compensation layer has almost the same height as a height of the reflection electrode, the height being measured from a surface of the first substrate.Type: GrantFiled: December 11, 2006Date of Patent: April 7, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Yuichi Yamaguchi, Hironori Kikkawa, Hiroshi Kanoh, Teruaki Suzuki, Hidenori Ikeno
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Patent number: 7511301Abstract: To provide an active matrix liquid crystal display unit in which a wiring break at the intersection of drain wiring and gate wiring is prevented with reliability. One or more recesses extending along drain wiring and having a depth equal to or greater than the width of the drain wiring are formed in at least one side of gate wiring at an area near an intersection of the gate wiring and the drain wiring. Furthermore, the gate wiring is composed of two layers of Mo and Al, for example, and the side faces of the gate wiring are tapered. The recesses having a sufficient depth formed in the gate wiring at the area near the intersection with the drain wiring adequately elongate the etchant penetration path.Type: GrantFiled: December 1, 2004Date of Patent: March 31, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Shigeru Kimura
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Publication number: 20090079921Abstract: To suppress light leakage at the time of dark state, and to provide a liquid crystal display device whose electrodes in the reflection areas can be formed with high precision. The liquid crystal display device has a reflection area within a pixel unit by corresponding at least to a reflection plate forming part, and the reflection area is driven with a lateral electric field mode and normally-white. A driving electrode for forming an electric field to a liquid crystal layer of the reflection area is formed on the reflection plate via an insulating film by using a non-transparent electric conductor.Type: ApplicationFiled: September 24, 2008Publication date: March 26, 2009Applicant: NEC LCD Technologies, Ltd.Inventors: Kenichi Mori, Michiaki Sakamoto, Ken Sumiyoshi, Hiroshi Nagai, Kenichirou Naka, Masayuki Jumonji, Hiroshi Tanabe
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Publication number: 20090079919Abstract: A liquid crystal display device comprises a plurality of pixels arrayed in a first direction and a second direction, each of the pixels having a reflective area in at least a portion thereof. The reflective area comprises a surface-irregularity film that is a film having a plurality of surface irregularities, a light reflecting film disposed as an upper layer over the surface-irregularity film, and an electrode group disposed as an upper layer over the light reflecting film. The electrode group in each of the pixels that are arrayed in at least the first direction comprises at least two types of electrode patterns having different layouts.Type: ApplicationFiled: September 25, 2008Publication date: March 26, 2009Applicant: NEC LCD Technologies, Ltd.Inventors: Shinya NIIOKA, Ken Sumiyoshi
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Patent number: 7505105Abstract: An in-plane switching liquid crystal display device is designed in such a way that an angle defined by the lengthwise direction of a common electrode and a pixel electrode and a rubbing direction of an alignment layer is set to 10 to 20°, a cell gap d is set to 2.7 ?m or smaller, the dielectric anisotropy ?? of a liquid crystal constituting a liquid crystal layer is set to 8 to 20, a white voltage Vwhite to be applied to the pixel electrode when displaying white is set to 4 to 7 V, and the white voltage Vwhite (V), the dielectric anisotropy ?? of the liquid crystal, the cell gap d (?m) and an interval L (?m) between the common electrode and the pixel electrode satisfy the following expression. 11.8 > V white d - 0.6 × L 0.5 × ? ? ? ? - 0.5 > 9.Type: GrantFiled: November 5, 2004Date of Patent: March 17, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Daisuke Inoue, Shinichi Nishida
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Patent number: 7499119Abstract: A LCD device prevents corrosion of the transparent conductive layers and contact resistance increase without arising the step coverage degradation due to the thickness increase of the interconnection layer, the step coverage degradation due to the formation of undercut portions, and productivity reduction and fabrication cost increase. A first interconnection line comprising a patterned Al or Al alloy layer is disposed on or over an insulating plate. A first insulating layer is formed to cover the first interconnection line to have a contact hole exposing a part of the first interconnection line. A first conductive material made of a plated metal is in contact with the exposed part of the first interconnection line in the contact hole. A first transparent conductive layer is in contact with the first conductive material. The first transparent conductive layer is electrically connected to the first interconnection line by way of the first conductive material.Type: GrantFiled: October 18, 2006Date of Patent: March 3, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Kyounei Yasuda
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Patent number: 7492431Abstract: In an active matrix liquid crystal display device, a drain and source of a TFT element for controlling power supply to a pixel electrode, are arranged so that an alignment direction of liquid crystal molecules over the source and drain does not change, thereby preventing formation of ghost images in the display. In one embodiment, an electric field generated between the source and drain is parallel to an initial non-zero alignment angle of the molecules.Type: GrantFiled: December 2, 2005Date of Patent: February 17, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Kimikazu Matsumoto, Shinichi Nishida
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Patent number: 7491079Abstract: A connector includes i) a plug including a pair of connecting members configured to connect the plug to a socket, a through-hole formed at a portion between the pair of connecting members, and plug contacts arranged on outer side faces of the respective connecting members, ii) a socket including a recess portion configured to receive the plug, and socket contacts arranged on inner side faces of the recess portion, and iii) a locking member configured to lock the plug into the socket, expanding the pair of the connecting members outward so as to contact each of the outer side faces of the connecting members onto a corresponding one of the inner side faces of the recess portion by inserting between the pair of the connecting members via the through-hole, and thereby bringing the plug contacts into contact with the socket contacts.Type: GrantFiled: July 6, 2007Date of Patent: February 17, 2009Assignee: NEC LCD Technologies, LtdInventor: Toshio Uchida
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Patent number: 7492434Abstract: A liquid crystal display (LCD) device includes a LCD panel and a flexible wiring member coupled together by an anisotropic-conductive adhesive film (ACF). The ACF includes insulating resin and a plurality of conductive particles dispersed therein and each having an insulating film on a conductive body. The insulating film is broken by the thermal compression of the ACF during manufacture of the LCD device, thereby allowing terminals of the LCD panel and terminals of the flexible wiring member to be electrically coupled together.Type: GrantFiled: August 3, 2006Date of Patent: February 17, 2009Assignee: NEC LCD Technologies, LTD.Inventors: Kiyofumi Kudo, Futoshi Nakanishi
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Patent number: 7489295Abstract: A liquid crystal display device is provided which is capable of preventing flicker or fringes in a display screen occurring even when changes in frequencies of a vertical sync signal and horizontal sync signal contained in a video signal input to the liquid crystal display device occur. A frequency detecting circuit sets a frequency of a driving pulse voltage at a value in the vicinity of “positive integer+½” times of the frequency of the horizontal sync signal and a pulse frequency for PWM (Pulse Width Modulation) light control at a value in the vicinity of a positive integral multiple or “positive integer+½” times of the vertical sync signal and a resonant frequency at a value in the vicinity of the frequency of the driving pulse voltage by adjusting capacitance value of a resonant capacitor.Type: GrantFiled: May 2, 2005Date of Patent: February 10, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Nobuaki Honbo
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Publication number: 20090027592Abstract: A display device includes a first display device, a second display device bonded to the first display device, and an adhesive provided between the first display device and the second display device to fix the first display device on the second display device, and including a light diffusion particle.Type: ApplicationFiled: July 10, 2008Publication date: January 29, 2009Applicant: NEC LCD Technologies, Ltd.Inventor: Toshihiko Motomatsu
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Patent number: 7483106Abstract: A data wiring is provided on a glass substrate in an active element substrate. For the data wiring, a first portion, extending in a direction that slopes and forms a fixed angle with respect to the rubbing direction of an oriented film, and a second portion, extending in a direction sloping to the opposite side of the first portion are alternately arranged and formed in a zigzag pattern. A convex insulation film is formed in a zigzag pattern to cover the data wiring and a common electrode is formed in a zigzag pattern to cover the insulation film. A shilding layer is formed in a zigzag pattern on an opposing substrate to completely cover the insulation film and does not protrude from the region directly above the common electrode. The high-contrast, multi-domain system in-plane switching type liquid crystal display device obtained with a high numerical aperture and low black brightness.Type: GrantFiled: January 17, 2006Date of Patent: January 27, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Hideki Ito, Daisuke Inoue, Takashi Kamino, Hiromitsu Tanaka
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Publication number: 20090015744Abstract: To provide a pixel matrix and the like, which are capable of improving the picture quality by suppressing generation of flicker and crosstalk without deteriorating the numerical aperture of the pixels and without increasing the manufacturing cost. A first switch device has transistors connected in series. When selected by a gate line, the transistors are set ON simultaneously to apply a voltage, which is supplied from a data line, to a pixel electrode. A second switch device has a transistor and a control capacitor. When selected by a gate line different from the one mentioned above, the transistor is set ON to supply a prescribed potential to a connection point between the transistors of the first switch, and the prescribed potential is stored at the control capacitor. When not selected by the both gate lines, the potential of the connection point is kept to the potential stored at the control capacitor.Type: ApplicationFiled: July 8, 2008Publication date: January 15, 2009Applicant: NEC LCD Technologies, Ltd.Inventor: HIROYUKI SEKINE
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Patent number: 7476899Abstract: Extraction wirings are respectively connected to a signal line of a switching element and a scanning line thereof, and led out to one side portion of a transparent insulating substrate. Conductive terminals respectively united with the extraction wiring are formed in tip end portions thereof, and a plurality of contact holes connected to the conductive terminals are formed on the conductive terminals so that a diver IC is mounted thereon by using conductive resin. Each of the extraction wirings is provided with a semiconductor film pattern in the vicinity of the contact hole for blocking the moisture in the conductive resin to reach the extraction wirings through an interlayer insulating film.Type: GrantFiled: May 12, 2005Date of Patent: January 13, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Hideto Motoshima, Masatoshi Tani, Shoichi Sonohata
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Patent number: 7476470Abstract: A method for manufacturing a thin film semiconductor device is provided which is capable of achieving simplification of manufacturing processes and of improving alignment accuracy without using a plurality of alignment masks. An alignment pattern is formed by using a resist layer having a plurality of regions each having a different film thickness corresponding to each of a plurality of patterns produced using a halftone mask having a halftone exposure region as a photomask and by forming a light transmitting portion to be an aperture pattern and by etching an underlying silicon layer. By having an underlying silicon layer exposed and implanting ions into an entire resist layer, only a main pattern region is doped with the ions.Type: GrantFiled: November 12, 2004Date of Patent: January 13, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Mitsuasa Takahashi
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Patent number: 7476898Abstract: A TFT of the present invention includes a gate electrode, a gate insulating film and a first semiconductor film which are sequentially formed on an insulating substrate, a second semiconductor film including a high density impurity which is formed on the first semiconductor film while being separated into portions at grade and a first electrode and a second electrode, each of which is formed on the separated second semiconductor film. Further, a peripheral portion of the first semiconductor film includes a protruded portion toward the outside from an edge of the second semiconductor film, and a surface of the protruded portion is roughened. By roughening the surface of the protruded portion, an on-current of the TFT can be maintained and the leakage current can be suppressed.Type: GrantFiled: April 13, 2005Date of Patent: January 13, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Mitsuma Oishi, Masayuki Uehara
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Patent number: 7473657Abstract: A method for changing an amorphous silicon film to a poly-crystalline silicon film includes the steps of irradiating an elongate pulse laser beam onto the silicon film while scanning in the direction normal to the major axis of the elongate pulse laser beam, to form a plurality of irradiated areas, irradiating flat-surface light onto the irradiated areas in the direction parallel to the major axis, and analyzing distribution of the reflected light from the irradiated areas to determine the threshold value of micro-crystallization. The threshold value is used to further determine an energy density of the elongate pulse laser beam for the phase change process.Type: GrantFiled: February 24, 2006Date of Patent: January 6, 2009Assignee: NEC LCD Technologies, Ltd.Inventor: Hiroshi Okumura
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Patent number: 7474374Abstract: An in-plane-switching-mode (IPS) LCD device includes a TFT substrate and a CF substrate sandwiching therebetween a liquid crystal (LC) layer, and a pair of polarizing films sandwiching therebetween the TFT and CF substrates and LC layer. The TFT substrate includes a SiNx insulation layer having a higher refractive index compared to the TFT substrate and LC layer. The thickness (d) of the SiNx layer is expressed by d=(100+170×k)±30 where k is an integer not smaller than zero and not larger than 5. The protective layer of the light-incident-side polarizing film near the insulation film has a thickness larger than zero and not larger than 57 ?m.Type: GrantFiled: December 21, 2004Date of Patent: January 6, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Hiroshi Nagai, Hidenori Ikeno
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Publication number: 20080316382Abstract: Disclosed is a display device including: a display panel on which a plurality of driver chips are mounted by using a COG configuration; a signal substrate on which a timing controller for generating a differential signal inputted into each of the driver chips is formed; and a connecting substrate which connects the plurality of driver chips with the timing controller, wherein the connecting substrate includes a first connecting substrate on which a first line for inputting the differential signal into a driver chip excluding a driver chip located at a terminating area is formed and a second connecting substrate on which a second line for inputting the differential signal into the driver chip located at the terminating area, and wherein a termination resistor connects the second line for transmitting the differential signal which is formed on the second connecting substrate.Type: ApplicationFiled: April 8, 2008Publication date: December 25, 2008Applicant: NEC LCD Technologies, Ltd.Inventor: Setsuko Sato